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AXPZ20 KNHC 252124
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2120 UTC Wed Apr 25 2018

Tropical Weather Discussion for the eastern Pacific Ocean from
the Equator to 32N, east of 140W. The following information is
based on satellite imagery, weather observations, radar, and
meteorological analysis.

Based on 1800 UTC surface analysis and satellite imagery through
2045 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

A surface trough extends from 10N85W to 06N100W. The ITCZ
extends from 06N100W to 09N110W to 06N130W to beyond 06N140W.
Scattered moderate and isolated strong convection are observed
from 04N to 10N between 81W and 100W. Scattered moderate
convection is observed from 05N to 12N between 110W and 123W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A ridge west of Baja California will strengthen this upcoming
weekend. Moderate to fresh northwest flow in the offshore waters
will become fresh to locally strong by Fri through Sat night.
Fresh to strong northerly winds are possible in the Gulf of
Tehuantepec this weekend, particularly during Sat morning as
high pressure builds over the western Gulf of Mexico. Light to
gentle W to NW winds are expected in the Gulf of California
through Sat. Elsewhere, mainly light to gentle winds are
expected through Sun.

OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND
WITHIN 750 NM OF ECUADOR...

Fresh northeast nocturnal winds are expected in and downstream
of the Gulf of Papagayo through tonight, resuming on Sunday
night. Gentle to moderate offshore flow will prevail elsewhere N
of 09N, and light to gentle SW winds are expected S of 09N with
seas of 4-6 ft.

REMAINDER OF THE AREA...

A cold front extends from 31N131W to 25N140W. This front will
move slowly east while dissipating into a trough tonight. NW
swell to 8 ft associated with winds well behind the front will
gradually subside through this evening. A ridge will build behind
the dissipating front through the weekend. Moderate to fresh
northeast trade winds and 7-9 ft seas are observed across the
tropical waters between 07N and 18N, south of the subtropical
ridge and north of the the ITCZ. These winds will increase to
fresh to locally strong as the pressure increases north of this
region into the upcoming weekend. This will also result in an
increase of the areal coverage of seas of 8-9 ft.

7-8 ft southerly swell observed south of the equator between 90W
and 120W will gradually subside through Thu morning.

$$
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